Dipolar cycloadditions in solid-phase organic synthesis (SPOS)

Summary We present a concise review of polymer-supported 1,3-dipolar cycloaddition reactions. Nitrile oxide and azomethine ylides constitute the two types of 1,3-dipoles which have been used in conjunction with solid-phase organic synthesis. These cycloaddition reactions on solid phase are generally of equal or greater efficiency than the analogous solution-phase reactions.     

Ultramicro determination of organic halogens using sealed tube dry combustion method

A sealed tube dry combustion method that is simple, accurate, and precise for ultramicro determination of halogens in organic compounds has been developed. Samples below 1 mg are heated at 580 °C for 1 h in an electric furnace. After the combustion and absorption of the gaseous halogen, the interior of the tube is rinsed. Subsequent titration is carried out potentiometrically with silver nitrate and yielded standard deviations of 0.21% for chlorine, 0.17% for bromine, and 0.25% for iodine.     

有机层界面对双层有机发光二极管复合效率的影响

建立了双层有机发光二极管中载流子在有机层界面复合的无序跳跃理论模型.由于有机分子材料的空间及能带结构的无序性，采用刚体模型处理有机层界面问题是不恰当的，而采用无序跳跃模型比较合理.复合效率及复合电流由载流子跳跃距离、有机层界面的有效势垒高度及该界面处的电场强度分布所决定：在双层器件ITO/α-NPD/Alq₃/Al中，当所加电压小于19.5V时，复合效率随着载流子跳跃距离的增加而增加，而大于19.5V时，复合效率随着其距离的增加而减少；复合效率随着有机层界面有效势垒高度的增加而增加； 关键词： 有机层界面 双层有机发光二极管 复合效率 有效势垒高度 无序跳跃模型     

一种基于荧光猝灭原理的光纤氧气传感器

用钌 (Ⅱ ) 邻菲咯啉配合物作为指示剂 ,研制成功一种基于荧光猝灭原理的光纤氧气传感器。采用锁相放大技术 ,实现了对弱荧光信号的检测。该传感器的检测下限为 5× 10 -6,检测精度为 5× 10 -7,响应时间T≤ 10s,并具有较强的抗干扰能力、较好的重复性和稳定性。     

Novelty Filtering Using Phase Conjugate Wave in Organic Dye-Doped Polymer Films

A real-time detection of a moving object was demonstrated by taking the subtraction between cross-polarized phase conjugate waves with fast and slow response times with two kinds of dye-doped phase conjugators. One consists of superposed films of an erythrosin-B-doped film and a methyl-orange-doped film, and the other is a film dispersed with both dyes. The relative phase between cross-polarized phase conjugate waves by the both dye-dispersed films was stable.     

3-methyl-4-metroxy-4'-nitrostilbene (MMONS) Crystal Growth and Studies of It

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有机物在水/双阳离子有机膨润土界面的吸附贡献率研究

在长、短碳链表面活性剂总量恒定条件下制备了一系列双阳离子有机膨润土，研究了其对水中苯胺，对硝基苯酚2，4－二氯酚的吸附行为，结果表明双阳离子有机膨润土对有机物的分配系数（Kd）与有机碳含量（f∝)、辛醇－水分配系数（lgKow)成线性正相关，与溶解度（lgS)成线性负相关，通过数学模拟，首次描述了表面吸附和分配作用两种吸附机制的相对贡献率和改性表面活性剂配比的关系；结果表明双阳离子有机膨润土对水中有机物两种吸附机制的主导地位与有机物本身性质有关，其主导作用发生变化的拐点与长碳链表面活性剂所占比重相关。     

载流子迁移率对单层有机发光二极管复合效率的影响

建立了在单层有机发光二极管中电场强度不太大(E≤104Vcm)的情况下,载流子注入、传输和复合的理论模型.通过求解非线性Painleve方程得出了电场强度随坐标变化的解析函数关系式以及电流密度随电压变化关系,给出了电流密度以及器件的复合效率在不同的载流子迁移率情况下随电压变化关系图像.结果表明,复合效率受载流子迁移率影响较大,在器件中多数载流子应具有较低的迁移率,而少数载流子应具有较高的迁移率,这样有利于载流子的注入和传输,从而可提高发光效率.并且得出当空穴迁移率大于电子迁移率时,复合区域偏向阴极,反之亦 关键词： 单层有机发光二极管 复合效率 迁移率